Abstract: An ignition apparatus for an internal combustion engine has an ignition coil 4,5 disposed within an electrically insulating case 1, and a power switch 6 disposed within the case and comprising a switching unit 8, 9 for intermittently supplying a primary current to the ignition coil. A gel 12 is disposed over the switching unit and at least one electrical wire conductor 21 having one end connected to the switching unit and the other end extending outwardly of the power switch. An electrically insulating resin 14 fills the insulating case, and supports/covers the ignition coil and the power switch. The electrical wire conductor includes a flexible bent portion 21a disposed within the gel for absorbing any tension in the conductor. With this arrangement, a heat shock resistant performance of the wire conductor is improved and working reliability is also improved.

Abstract: An ignition apparatus for internal combustion engine includes an ignition power unit 1A having a power transistor 14A for feeding and shutting off a primary current i1 to and from an ignition coil 13 and a control circuit 2 having a CPU 21 for calculating an ignition timing of an internal combustion engine and a feeding time of the primary current in accordance with an operating state D and outputting an ignition signal G to the power transistor, feeds and shuts off the primary current in response to an ignition signal Ga to generate a high-tension secondary voltage from the ignition coil. The power transistor has a characteristic for increasing a direct current amplifying ratio as a base to emitter voltage VBE between a base and emitter increases to suppress the rising-up of the primary current to thereby suppress a secondary voltage generated when the primary current starts to be fed.

Abstract: An ignition apparatus for an internal combustion engine includes a power switch 16 for intermittently feeding a primary current to an ignition coil, and primary and secondary coils 5, 6 of the ignition coil contained in an insulation case 1 with the power switch and fixed by an insulating resin material 15 poured into the case. An insulating member 21 is interposed between the secondary coil 6 and the power switch 16 for suppressing thermal flow between the secondary coil 6 and the power switch 16. with this arrangement, a temperature increase caused by thermal interference between the ignition coil and the power switch is thus suppressed.

Abstract: Disclosed is an ignition apparatus for an internal combustion engine including a power switch 20 for intermittently feeding a primary current to an ignition coil, a primary coil 5 and a secondary coil 6 of the ignition coil being contained in an insulation case 1 with the power switch 20, primary coil 5 and secondary coil 6 being fixed by an insulating resin material 15 poured into the insulation case 1, the ignition apparatus comprising a shield plate 23 interposed between the secondary coil 6 and the power switch 20 to shield the power switch 20 from electromagnetic waves. With this arrangement, there can be obtained an ignition apparatus for an internal combustion engine by which the malfunction of the power switch and the like caused by electromagnetic waves generated at the ignition coil can be prevented.

Abstract: An ignition coil for an internal combustion engine to suppress the superposition of a noise signal caused by a capacitive discharge current at an ignition plug to thereby prevent the faulty operation of other circuit devices. The ignition coil has first and second non-magnetic bobbins into which a magnetic core 3 is inserted, a primary coil (1) wire wound around the first bobbin, a secondary coil (2) wire wound around the second bobbin, an interrupting circuit 7 connected to one end of the primary coil for interrupting a primary current i1 flowing to the primary coil, and an ignition plug 5 connected to one end of the secondary coil for generating a discharge spark by a secondary voltage V2 output from the secondary coil. A buffer coil 8 having an inductance which is much smaller than that of the primary or secondary coil is connected in series with one of them.

Abstract: An ignition apparatus for internal combustion engine includes an ignition power unit 1A having an ignition coil 13 and a power transistor 14 for supplying and shutting off a primary current i1 to the ignition coil; and a control circuit 2A for determining ignition timing of the internal combustion engine and a period for supply of the primary current in accordance with driving conditions D of the internal combustion engine so that it generates an ignition signal Ga in the form of a pulse to the power transistor. The primary current is supplied and shut off by the power transistor in accordance with the ignition signal to produce a high-tension secondary voltage V2 from the ignition coil. The control circuit includes an oscillation circuit 23 starting operation from a point when the ignition signal rises and operating for a predetermined period shorter than a pulse width of the ignition signal, the waveform of the ignition signal thereby being made to rise gradually.

Abstract: A plurality of transformers each comprised of a core, a primary winding, and a secondary winding are accommodated in one case, the transformers are incorporated in alternately different directions, high-tension terminals, to which output ends of the secondary winding are connected, are provided on a side opposite to the side where a core disposed outside the secondary winding is located, and a layer of a resin minimum for insulation is provided between adjacent ones of the secondary windings.

Abstract: An internal combustion engine ignition device comprises an ignition coil, a preliminary assembly, and a casing for accommodating and covering the ignition coil and the preliminary assembly with resin. The preliminary assembly comprises a heat sink, a control unit, and a cushion cover for covering the heat sink and control unit and having at least one first protrusion. The control unit comprises a control circuit for controlling the flow of primary current in the ignition coil, and at least one first recess for engaging with the first protrusion of the cushion cover.

Abstract: An ignition coil assembly for an internal combustion engine includes a primary coil, a secondary coil, at least one bobbin, a core, a first resin member and a casing. The primary coil and said secondary coil are wound on the bobbin. The core has core elements with a gap there-between through which the primary and secondary coils are magnetically coupled to one each other. The casing accommodates the primary and secondary coils, the bobbin and the core. And the first resin member covers a part of the core elements, the part which are confronted with said secondary coil, and the first resin member is accommodated in the casing.

Abstract: An ignition coil unit comprises a coil assembly (55) having an ignition coil (A), a power switch circuit (B) having a plurality of electric and electronic components therein for interrupting an electric current flowing through the ignition coil (A) and a terminal conductor (8) for electrically connecting the coil assembly (55) to an external circuit, and an electrically insulating transfer-molded resin (50) disposed around the coil assembly (55) for supporting therein the coil assembly (55). Further, the ignition coil (A), the power switch circuit (B) and the terminal conductor (8) are mechanically connected into the coil assembly (55). The present invention also resides in a method for manufacturing the same.

Abstract: An ignition coil device for an internal combustion engine comprising: a plurality of iron cores; a plurality of ignition coils having a plurality of primary coils provided around said plurality of iron cores and a plurality of secondary coils magnetically-coupled with said plurality of primary coils through the plurality of iron cores; a case accommodating the plurality of iron cores and the plurality of ignition coils; and a plurality of control units accommodated in said case of which number is equal to the number of the plurality of ignition coils.

Abstract: An ignition apparatus for an internal combustion engine having a current limiting function is simple in construction and can avoid variations In the current limiting values for respective power transistors 103. A current limiting circuit 109 includes a common resistor 105 connected at one end thereof to a power supply 101 and at the other end thereof to a plurality of ignition voltage generating circuits 104. an operational amplifier 107 making a comparison between a voltage V.sub.105 across the resistor 105 and a reference voltage Vr which corresponds to a predetermined upper limit current for each power transistor 103 and generating an output signal A of a magnitude proportional to a difference (V.sub.105 -Vr) therebetween, and a plurality of transistors 108 provided one for each power transistor 103 and connected to receive the output signal A from the operational amplifier 107 for limiting a current through a corresponding power transistor 103 in response to the output signal A.

Abstract: An ignitor comprises an ignition coil unit mounted to a base and a control unit disposed on the ignition coil unit and electrically connected thereto for controlling a primary current to the ignition coil unit, which includes a base plate attached to the base and a crank angle sensor for detecting the turning angle of an engine crank shaft. The ignitor also comprises a rotary shaft rotatably supported by the base for rotation in synchronization with the rotation of an internal combustion engine which extends through the ignition coil unit and has a distributor rotor on an extended end thereof. The control unit further comprises a power switch package having a mold resin which hermetically molds therein a power transistor and an integrated controlling circuit into a sealed package. The power transistor interrupts an electric current flowing through a primary coil of the ignition coil and an integrated controlling circuit controls the power transistor.

Abstract: An ignition device for a multi-cylinder engine includes a plurality of integral ignition device units 9A and 9B associated with respective cylinders. A single ignition detector circuit 8, inserted between the battery 1 and the primary coil of the ignition coil 5 of respective units 9A and 9B, generates an ignition confirmation signal upon detecting a current exceeding a predetermined level.

Abstract: In a method of manufacturing a semiconductor package with an externally connecting coupler, a semiconductor package has a die pad portion on which a semiconductor device is mounted and a plurality of leads including at least one lead extending from the die pad portion and coupled to each other by a tie bar. The method includes the steps of mounting the device on the die pad of the leadframe, wire bonding between the device and inner leads, premolding the inner leads so as to ensure mutual mechanical connection of the leads and support of the leads during manufacture, cutting off unnecessary portions of the leadframe and portions of the leadframe located between the leads to electrically separate the leads from each other, and forming a mold package and the external connecting coupler as one unit using an electrically insulating resin. The mold package seals the die pad portion of the leadframe on which the device is mounted, the inner leads and the premolding.

Abstract: A capacitor discharge ignition device for an internal combustion engine includes a booster coil 21 and a transistor 22 for generating a boosted voltage; a circuit 15A for generating a switching signal for the transistor in response to an ignition signal; first and second condensers 7, 8 for charging with the boosted voltage; an ignition coil 10 to whose secondary a spark plug is connected; a thyristor 13 forming a first closed discharge circuit with the first condenser and the ignition coil primary, which is turned on in synchronism with the ignition signal; and an inductor 9 forming a second closed circuit with the second condenser, the ignition coil primary and the thyristor. The discharge energy of the second condenser stored in the inductor is supplied to the ignition coil primary to extend the discharge time at the spark plug. A delay circuit 16 prevents the transistor from turning on during the extended discharge time, thus establishing a third closed inductor discharge path through the booster coil.

Abstract: An LCDI-type ignition apparatus for an internal combustion engine includes first and second capacitors connected to an ignition coil and a voltage source for generating a charging voltage for the capacitors. The first capacitor is for producing an initial discharge of a spark plug, and the second capacitor is for lengthening the discharge of the spark plug after discharge has been initiated by the first capacitor. In one form of the invention, the second capacitor is charged only after the first capacitor has been charged by the voltage source to a prescribed voltage sufficient to produce a suitable discharge of the spark plug. As a result, even when the engine is operating at a high rotational speed and the time between consecutive firings of the engine is small, an adequate ignition voltage can be obtained. In another form of the invention, the charging voltage(s) of one or both of the capacitors is or are varied in accordance with the one or more engine operating conditions.

Abstract: An igniter for an internal combustion engine comprising a power transistor (4), a current regulating circuit (7) and a current detection resistor (12) connected between the power transistor (4) and the ground for detecting the current flowing through an ignition coil. The current detection resistor (12) is trimmed to provide a controlled resistance between the power transistor (4) and the ground. The current detection resistor (12) may be disposed within or outside the mold resin package (10) for hermetically sealing the power transistor (4) and the current regulating circuit (7).

Abstract: A current limiter in an ignition apparatus for an internal combustion engine including a differential amplifier 20 is able to limit a primary winding current of an ignition coil to a prescribed limit value which is independent of a voltage as sensed by a current sensing resistor 11, thus providing a highly stable operating characteristic. The factor of current amplification of the differential amplifier can be increased without accompanying oscillations of the current limiter. The current sensing resistor senses a voltage corresponding to a current flowing from the primary winding of the ignition coil to a power transistor 4 which turns on and off the power supply to the ignition coil. A reference voltage source 12 generates a reference voltage for comparison with the voltage sensed by the current sensing resistor.

Abstract: An ignition device for an internal combustion engine including: a DC power source; a convertor for raising the voltage of the DC power source to a predetermined voltage; a charge storing device arranged to be charged with the output from the convertor; an ignition coil; an ignition signal generator for generating an ignition signal in synchronization with the rotation of the internal combustion engine; a switch which is switched on in response to the ignition signal generated by the ignition signal generator to discharge a charge stored in the charge storing device through the ignition coil; and a controller for stopping the operation of the convertor during a period in which the ignition signal is being transmitted from the ignition signal generator.